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Cu(OH)2 ---> CuO + H2O
xg 5g
80u 98u
CuSO4 + 2NaOH ---> Cu(OH)2 + Na2SO4
xg 6, 125g
d = 1, 33 g/cm3
m = 5g
≈ 3, 8 cm3
3, 8 cm3 - 30%
x - 100%
≈ 12, 67 cm3